You wish to test the following claim (Ha) at a significance level of a = 0.10. H.:µ = 55.4 Ha:µ < 55.4 You believe the population is normally distributed, but you do not know the standard deviation. You obtain the following sample of data: data 19.2 19.2 76 41

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**Hypothesis Testing Example**

**Objective:** 
Test the following claim (\( H_a \)) at a significance level of \( \alpha = 0.10 \).

**Null Hypothesis (\( H_0 \)):** 
\( \mu = 55.4 \)

**Alternative Hypothesis (\( H_a \)):** 
\( \mu < 55.4 \)

**Sample Information:** 
You assume the population is normally distributed but the standard deviation is unknown. You collect the following sample data:

- 19.2
- 19.2
- 76
- 41

**Questions:**

1. **What is the test statistic for this sample?**
   - Provide the test statistic accurate to three decimal places.

2. **What is the p-value for this sample?**
   - Provide the p-value accurate to four decimal places.

**Decision Criteria:**

- Determine if the p-value is:
  - Less than (or equal to) \( \alpha \)
  - Greater than \( \alpha \)

**Conclusion:**

Based on the test statistic, make a decision to either:
- Reject the null hypothesis
- Accept the null hypothesis
- Fail to reject the null hypothesis
Transcribed Image Text:**Hypothesis Testing Example** **Objective:** Test the following claim (\( H_a \)) at a significance level of \( \alpha = 0.10 \). **Null Hypothesis (\( H_0 \)):** \( \mu = 55.4 \) **Alternative Hypothesis (\( H_a \)):** \( \mu < 55.4 \) **Sample Information:** You assume the population is normally distributed but the standard deviation is unknown. You collect the following sample data: - 19.2 - 19.2 - 76 - 41 **Questions:** 1. **What is the test statistic for this sample?** - Provide the test statistic accurate to three decimal places. 2. **What is the p-value for this sample?** - Provide the p-value accurate to four decimal places. **Decision Criteria:** - Determine if the p-value is: - Less than (or equal to) \( \alpha \) - Greater than \( \alpha \) **Conclusion:** Based on the test statistic, make a decision to either: - Reject the null hypothesis - Accept the null hypothesis - Fail to reject the null hypothesis
As such, the final conclusion is that...

- There is sufficient evidence to warrant rejection of the claim that the population mean is less than 55.4.

- There is not sufficient evidence to warrant rejection of the claim that the population mean is less than 55.4.

- The sample data support the claim that the population mean is less than 55.4.

- There is not sufficient sample evidence to support the claim that the population mean is less than 55.4.
Transcribed Image Text:As such, the final conclusion is that... - There is sufficient evidence to warrant rejection of the claim that the population mean is less than 55.4. - There is not sufficient evidence to warrant rejection of the claim that the population mean is less than 55.4. - The sample data support the claim that the population mean is less than 55.4. - There is not sufficient sample evidence to support the claim that the population mean is less than 55.4.
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